# NTSB investigations, AK: Structural icing NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB ANC23LA065](https://openairdocs.org/ntsb/ANC23LA065.md): Beech B36TC · Cape Yakataga, AK · Accident · 2 fatal · Class 3 · Limited · Final report · Aug 27, 2023 · N6709Q · Destroyed > The pilot’s continued flight into moderate to severe icing conditions, including supercooled large droplets, over mountainous terrain, which resulted in a loss of control and impact with terrain. Contributing to the accident was the National Weather Service… - [NTSB ANC21LA073](https://openairdocs.org/ntsb/ANC21LA073.md): Cessna 208 · Fairbanks, AK · Accident · No injuries · Class 3 · Limited · Final report · Aug 16, 2021 · N97HA · Substantial damage > The pilot’s unexpected encounter with supercooled liquid droplets (SLD), which resulted in a loss of control due to ice accumulation. Contributing to the accident were: (1) the pilot’s failure to maintain the minimum airspeed for flight in icing conditions,… - [NTSB ANC19FA038](https://openairdocs.org/ntsb/ANC19FA038.md): Cessna 172 · Skwentna, AK · Accident · 1 fatal · Class 2 · Field · Final report · Mar 7, 2019 · N7469A · Substantial damage > The pilot’s decision to depart into marginal visual flight rule conditions in mountainous terrain with the potential for icing, and the airplane’s accumulation of structural icing, which resulted in the pilot’s inability to maintain airplane control and the… - [NTSB ANC17TA015](https://openairdocs.org/ntsb/ANC17TA015.md): Piper PA-32 · Pilot Point, AK · Accident · Serious injuries · Final report · Jan 17, 2017 · N4261T · Substantial damage > The pilot's continued flight into known icing conditions, which resulted in structural icing and a forced landing on icy, snow-covered terrain. - [NTSB ANC17FA004](https://openairdocs.org/ntsb/ANC17FA004.md): Fairchild Heli-Porter Pilatus PC-6 · Port Alsworth, AK · Accident · 1 fatal · Field investigation · Final report · Oct 29, 2016 · N5308F · Substantial damage > The airplane's collision with mountainous terrain while operating in an area of reduced visibility and icing conditions. Contributing to the accident was the pilot's inadequate preflight planning, which would have identified deteriorating weather conditions… - [NTSB ANC14CA010](https://openairdocs.org/ntsb/ANC14CA010.md): Bellanca 7GCBC · Soldotna, AK · Accident · Minor injuries · Data collection · Final report · Dec 4, 2013 · N88342 · Substantial damage > The operation of the airplane by the uncertificated student pilot, his failure to recognize conditions conducive to structural icing, and subsequent decision to depart in conditions conducive to structural icing, resulting in a severe icing encounter and… - [NTSB ANC13CA107](https://openairdocs.org/ntsb/ANC13CA107.md): Piper PA 18-150 · Wasilla, AK · Accident · No injuries · Data collection · Final report · Sep 30, 2013 · N40579 · Substantial damage > The pilot's improper preflight inspection, and failure to remove heavy frost from the airplane prior to attempting a takeoff. - [NTSB ANC12CA115](https://openairdocs.org/ntsb/ANC12CA115.md): Cessna 182A · Port Lions, AK · Accident · No injuries · Data collection · Final report · Oct 1, 2012 · N2028G · Substantial damage > The pilot's decision to take off with ice- and snow-contaminated wings. - [NTSB ANC12IA024](https://openairdocs.org/ntsb/ANC12IA024.md): Bombardier Learjet 35A · Anchorage, AK · Incident · No injuries · Incident investigation · Final report · Mar 6, 2012 · N544LM · Minor damage > The flightcrew's loss of visual reference to the runway after encountering severe in-flight icing conditions, which resulted in a loss of control while landing and exceedence of the capabilities of the airplane's windscreen anti-ice systems. Contributing to… - [NTSB ANC12CA016](https://openairdocs.org/ntsb/ANC12CA016.md): Cessna 207A · Kwigillingok, AK · Accident · Minor injuries · Data collection · Final report · Dec 21, 2011 · N6480H · Substantial damage > The pilot’s decision to continue visual flight into instrument meteorological conditions with moderate icing, which resulted in structural icing and an aerodynamic stall. - [NTSB ANC10LA019](https://openairdocs.org/ntsb/ANC10LA019.md): Cessna 208B · Kwigillingok, AK · Accident · No injuries · Limited investigation · Final report · Feb 17, 2010 · N207DR · Substantial damage > The pilot's decision to take off with ice-contaminated wings in freezing rain and mist, which resulted in an aerodynamic stall. - [NTSB ANC09LA038](https://openairdocs.org/ntsb/ANC09LA038.md): Cessna TU206 · Bethel, AK · Accident · Minor injuries · Limited investigation · Final report · May 6, 2009 · N629SP · Substantial damage > The pilot’s failure to remove visible frost from the wings during the preflight inspection, and his failure to maintain adequate airspeed to avoid a stall. Contributing to the accident were conditions conducive to structural icing/frost. - [NTSB ANC09LA012](https://openairdocs.org/ntsb/ANC09LA012.md): Cessna 207 · Napaskiak, AK · Accident · Minor injuries · Limited investigation · Final report · Nov 14, 2008 · N36CF · Substantial damage > The pilot's continued flight into adverse weather and icing conditions, and his failure to maintain sufficient airspeed to avoid a stall, resulting in a loss of control and in-flight collision with terrain while on an approach to land. ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'AK' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '210' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-events/210/sequence?state=AK --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.